کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1813759 1025640 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Luminescence enhancement in ZnO nanocrystals by polarized light
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Luminescence enhancement in ZnO nanocrystals by polarized light
چکیده انگلیسی

ZnO nano- and microcrystals produced much enhanced luminescence output when excited by polarized light. The effect of polarized excitation on the intensity and polarization of photoluminescence (PL) of wurtzite ZnO is reported. ZnO nano- and microcrystals (nc and mc) showed up to 18-fold increase in PL intensity when excited with linearly polarized light at 305 nm. The degree of luminescence enhancement was different for different PL peaks and more for ZnO mcs compared to ncs. Time resolved PL decay measurements indicated biexponential decay in 100 μs time scale. The observations suggested that luminescence enhancement depended on polarization selective band to band excitation arising due to crystalline anisotropy and shape asymmetry and subsequent defect related emission.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 405, Issue 1, 1 January 2010, Pages 198–203
نویسندگان
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